Need info regarding tasks in ThreadPool, Executor and ExecutorService

Hi all,
I would like to know the answers for the following questions regarding tasks:
1.How do you create a self-starting task.(the task that starts executing as soon as we create runnable object)
2. how do we create a task which is executed outside the runnableObject
3. If we are executing one task in a program, how many tasks are actually running in the JVM
4. how do we know whether a task is active or not
5. what happens when a task in in wait but no one signals it
6. what happens when a task does not release the lock
7. which method is used to pause a task
8. how do we stop and restart a task
9. if three instances of a runnable class start executing in parallel, which one terminates first.
I was looking for the answers for the above question in java doc and few other sites, but was of no help.
It would be great if anyone can answer these questions. That would be lot of help.
Thanks!!

I see nothing in your questions relating to ThreadPool or Executors.
Sounds like a "homework" assignment.
First thing you need to be clearer on is what is a "task". There is no pre-defined notion of "task" in Java.
Any introductory text of multi-threading in Java will answer those questions as they apply to threads. See the FAQ for some references.
David Holmes

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Please help me understand why the users are not able to see the content.

ACLs, like Accounts, are optional security setting which may add on some extra functionality to mandatory security groups. Likewise, the resulting permission is taken as an intersection of SG and ACLs.
But in the second part the number of set of users is huge (approx say 600)I don't get this completely. Does this mean that those "sets of users" (users who see the same data) are distinct and that there is 600 of such groups?
If you read thoroughly the manual I sent earlier, there is a recommendation that there should be maximum 50 security groups, and you should use accounts, should this number be exceeded. This means you could have all the documents in one security group (and have one common role with Read permission), but combine it with accounts. ACLs are not a good choice here - their performance and manageability is much worse than of accounts. ACLs are primarily used if you expect security settings to change during the lifetime (e.g. a project manager adds temporarily rights to access an item to another user, and revokes it when the user finishes his or her work).
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Hi,
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[Queries in Workbook|http://help.sap.com/saphelp_sem40bw/helpdata/en/e3/e60138fede083de10000009b38f8cf/frameset.htm]
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Kalakonda wrote:
I need help regarding scanning of image directly from scanner. Here is the scenario when the person clicks scan button on the webpage should scan the image and resize it and store it in some temp location. Is there any way i can do this. Any Help regarding this would be great!!!So what you are doing is you have a Scanner (hardware: like an HP flatbed scanner) attached to a server that you want to use as a scanning station? Is this the senario that you are talking about?

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ACLs, like Accounts, are optional security setting which may add on some extra functionality to mandatory security groups. Likewise, the resulting permission is taken as an intersection of SG and ACLs.
But in the second part the number of set of users is huge (approx say 600)I don't get this completely. Does this mean that those "sets of users" (users who see the same data) are distinct and that there is 600 of such groups?
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Note that accounts as well as permissions of users within accounts can also be mapped externally (from LDAP/AD) and it usually follows some kind of org chart.
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Maybe it is about time you leave your ideal world, and take a reality check.
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Need info regarding tasks in ThreadPool, Executor and ExecutorService

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